fn main() {
    print!("(1..=5):");
    for i in (1..=5) {
        print!("{} ", i);
    }
    println!();

    print!("(1..=5).rev: ");
    for i in (1..=5).rev() {
        print!{"{} ", i}
    }
    println!();

    let sum: i32 = (1..=5).sum();
    println!("1+2+3+4+5={}", sum);
}
